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BU1840AMUV-E 数据表(PDF) 3 Page - Rohm

部件名 BU1840AMUV-E
功能描述  For 2Cell Solar,Synchronous Switch-Mode Charger IC
Download  17 Pages
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BU1840AMUV-E 数据表(HTML) 3 Page - Rohm

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BU1840AMUV
TSZ02201-0Q1Q0AJ00130-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
2.AUG.2012 Rev.001
TSZ22111・15・001
www.rohm.com
Electrical characteristics (Unless otherwise specified: Ta=25℃, VIO=1.8V)
Item
Symbol
Min.
Typ.
Max.
Unit
Conditions
I
2C input (SDA, SCL)】
L level input voltage
VIL1
-0.3
-
0.25 ×
VIO
V
H level input voltage
VIH1
0.75 ×
VIO
-
VIO
+0.3
V
Hysteresis width
Vhys1
0.05 ×
VIO
-
-
V
L level output voltage
(Sink current = 3mA)
VOL1
0
-
0.3
V
SDA pin
Input current
Iin1
-3
-
3
μ
A
Pin voltage=0~VIO
I
2C BUS format
The writing/reading operation is based on the I
2C slave standard.
Slave address
A7
A6
A5
A4
A3
A2
A1
R/W
1
1
1
0
0
0
1
1/0
Bit Transfer
SCL transfers 1-bit data during H. SCL cannot change
signal of SDA during H at the time of bit transfer. If SDA
changes while SCL is H, START conditions or STOP
conditions will occur and it will be interpreted as a
control signal.
START and STOP condition
When SDA and SCL are H, data is not transferred on
the I
2C- bus. This condition indicates, if SDA changes
from H to L while SCL has been H, it will become START
(S) conditions, and an access start, if SDA changes from
L to H while SCL has been H, it will become STOP (P)
conditions and an access end.
Acknowledge
It transfers data 8 bits each after the
occurrence
of
START
condition.
A
transmitter opens SDA after transfer 8bits
data,
and
a
receiver
returns
the
acknowledge signal by setting SDA to L.
Protocol
SDA
SCL
SDA a state of stability:
Data are effective
SDA
It can change
SDA
SCL
SP
START condition
STOP condition
12
89
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
acknowledge
not acknowledge
S
START condition
clock pulse for
acknowledgement
SCL
A
A
S
P
The mastering side is a transmitter.
The slave side is a receiver.
The slave side is a transmitter.
The mastering side is a receiver.
Unacknowledged
Acknowledge
Stop condition
Start condition
Sr Repetition start condition
Legend


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